Copy and paste it in your userconfig.cfg
Credits.
I have made it by myself.
Код:
bind "mouse5" "unbind MWHEELUP invprev;bind MWHEELUP +jump; unbind MWHEELDOWN invprev; bind MWHEELDOWN +duck; " bind "mouse4" "unbind MWHEELUP +jump; bind MWHEELUP invprev; unbind MWHEELDOWN +duck; bind MWHEELDOWN invnext; "